Water heater



FIG. 1 is a perspective view of a water heater showing the present design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a cross sectional view in which the internal mechanism is not shown for the sake of clarity, taken along line 8-8 of FIG. 2 thereof;

FIG. 9 is a cross sectional view in which the internal mechanism is not shown for the sake of clarity, taken along line 9-9 of FIG. 2 thereof; and,

FIG. 10 is a cross sectional view in which the internal mechanism is not shown for the sake of clarity, taken along line 10-10 of FIG. 2 thereof.

The broken lines and the areas within them in the drawings depict portions of the water heater that form no part of the claimed design. 

CLAIM The ornamental design for a water heater, as shown and described. 